\section{Overall description}
\label{sec:overall}

	% TODO:: Explain the hierarchy of world, layer, node, object, pixel and so on..
	% Wait a minute .. isn't that SDS?
	% Still, that's needed for requirements
	
	\subsection{Product perspective}

	\subsection{Product functions}
	
	\subsection{User characteristics}
	
	\subsection{Constraints}
	
	\subsection{Assumptions and dependencies}